historical data within the dashed lines in Figure 2A. When a large 
meander from the main flow reaches an extreme stage, it may break off 
into a large cyclonic eddy to the south, or a large anticyclonic eddy 
to the north. This condition would appear to satisfy most interpre- 
tations to date of the Gulf Stream in this region; in fact, a clock- 
wise eddy about 50 miles in diameter has been studied in the spring 
of 1966 at about 41°N, 60°W in a survey coordinated by the U. S. Coast 
and Geodetic Surveye Such an eddy at this location tends to verify 
that the axis of the Gulf Stream exists at Locations 4 and 5 in 
Figure 2)A. 
The sparse data available show the subsurface current to have 
permanent features similar to the surface current. Parts A and B of 
Figure 22 are composite profiles from data at several stations within 
the same area and show the concentration of direct meter observations 
at various depths. Part A, although to the left of the axis, indicates 
that higher speeds occur more frequently during summer; Part B shows 
the distribution of speeds where depths are much greater. 
Although current measurements have not been obtained near the 
bottom directly beneath the axis of the Gulf Stream, deepwater observa- 
tions indicate that the flow is essentially in the same direction from 
surface to bottom; computations show that the current speed at the 
bottom is probably 10 cm/sec. In 1960, direct measurements obtained 
in the vicinity of 38°30'N, 64°30'W at depths of about 3,000 meters 
show a flow of about 0.2 knot in the same direction as the surface 
current. 
Data obtained in 1962 indicate a deep southwest flow near the 
bottom along the continental slope at depths below 800 meters with 
63 
